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(No Model.)

B. F. ORTMAN 8v H. R. TAYLOR.

DUST COLLECTOR. Y

lrrlyPatelted Apr, 22, 1.884

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' Diarreev BTATns BATTNT Trice.

BARNIM F. OBTMAN AND HORATIO R. TAYLOR, OF BUFFALO, NEW YORK.

DUST-'OLLECTOR.

SPECIFICATION forming part of Letters Patent No. 297,436, dated April22, 1884.

Application tiled January Q3, 1884.

To all whom t may concern.:

Be it known that we, BARNIM F. ORTMAN and HoRA'rIo R. TAYLOR, both ofthe city of Buffalo, in the county of Erie and State of New York, haveinvented new and useful Improvements in DustCollectors, of which thefollowing is aspeciiication.

This invention relates to an improvement in that class of machines whichare employed in iiouringmills for separating the dust from the air whichhas passed through iniddlingspurifiers, grain-separators, or othermachines in which an air-current is employed for separating materials ofdifferent gravities. In dustcatchers as ordinarily constructed theseparation of the dust' from the air is effected either by sifting orstraining the air through filtercloths or by discharging the dust-ladenair into large rooms, in which it is permitted to come to a state ofcomparative rest, whereby the dust is permitted to drop out of the air.The first-mentioned system requires complicated machinery to render iteffective in a con-y tinuous operation, and the last-mentioned system isobjectionable because the dust-rooms occupy much valuable space in amill.

The object of our invention is to produce a machine which is simpleinconstruction, small and compact, and which requires no moving parts forits operation.

Our invention consists, to these ends, of a machine in which the dust isseparated from the air by the dust-particles being permitted to continuetheir motion by their own momentum and to enter a chamber or spaceprovided for their reception, while the air is deflected andnallydischarged freed from the dust, as will be hereinafter fully set forth,and pointed out in the claims.

In the accompanying drawings, Figure l is a horizontal section of adust-catcher embodying our invention. Fig. 2 is a vertical sectionalelevation on line .fr x of Fig. l. Fig. 3 is a horizontal section, on anenlarged scale, of a portion of the machine. Fig. 4 is a horizontalsection illustrating a modified construction of the machine. section inline y y, Fig. 4.

Likeiletters of reference denote like parts in the several figures.

A represents the air-spout throughwhich the Fig. 5 is a vertical cross-(No model.)

dust-laden air enters the machine, and which is connected with the spoutthrough which the air is discharged from the middlings-puriiier,grain-separator, or other machine.

B represents a spiral air-passage, forming a continuation of the spoutA, and having its outer vertical wall, b, constructed of perforatedmetal, wire-gauze, or other similar perforated material, while its innerwall, c, is constructed of wood, sheet metal, or other impcrforatematerial. The inner end of the spiral air-passage B connects withaspout,D, through which the air is discharged from the machine after the dusthas been separated from the air.

E represents a spiral dead-air chamberv arranged on the outer side ofthe air-passage B, and bounded on the inner side by the perforated wallb and on its outer side by a tight wall, e.

f represents upright boards or partitions arranged in the dead-airchamber E, between the perforated wall b and the outer tight wallv c, tobreak the continuity of the air-chamber and prevent the air from iiowingthrough the same along the outer wall, e.

G represents the tight top plate of the machine,covering the air-passageB and dead-air chamber E, and provided at the center with an opening, g,with which the discharge-spout D connects. h represents the bottom plateof the air-passa-ge B. This plate is preferably made of perforatedmetal, except at the center of the machine, where the air passing overit is almost completely freed from the dust, and where it may be madeimperforate.

I represent horizontal pieces which support the spiral walls, b and c.

K represents a hopper or other suitable receptacle arranged underneaththe dead air chamber E, for the reception of the material which passesinto said chamber. The hopper K is tightly connected with thecircumferential wall e of the dead-air chamber, and pro? vided with adischarge spout, L, which is trapped by a weighted valve, l, a conveyer,or some other suitable contrivance, so as to prevent air-currents frompassing through the hopper. The air, entering the spiral passage Bthrough the spout A, is continually deilected out of its course by theouter perforated spiral wa-ll, b, of the passage B. The dust- IOOparticles tend by their momentum to persist in their onward movement,and those of the particles which arrive opposite a perforation in thewall b pass through the perforation into the dead-air chamber E and dropby gravity into the hopper K below. rI he air-particles do not enter thedead-air chamber because of the resistance offered by the air containedin said chamber. This separation of the dustparticles from the air iscontinued throughout the spiral air -passage B, and the latter is madeof sufficient length to cause a complete separation of the dust from theair, and the latter is discharged through the spout D in a purecondition.

The perforations in the wall b arepreferably made in the form of uprightslots, having their rear edges bent inwardly, asrepresented in Fig. 3,to facilitate the entrance of the dustparticles into the dead-airchamber. Any dust-particles which settle upon the bottom plate, h, ofthe air-passage B are moved along by the air-current until they reach aperforation, when they drop into the hopper K.

The construction represented in Figs. l and 3 renders the machine verycompact; but, if preferred, au air-passage may be arranged in zigzagform, as represented in Figs. 4 and 5. In the last-mentionedconstruction the airpassage B is bounded by perforated plates m, formingits outer curved walls, which deflect the air current out of its course,and each side of the airpassage is provided with a deadair chamber, D,both of which discharge the dust into the hopper K below. The verticalperforated wall b keeps itself free from dust without the aid of anycleaning device.

The dust-collector is preferably so arranged with reference to themiddlings-puriiier, grainseparator, or other machine with which it isconnected that the fan, which causes the aircurrent in the machine,drives the dust-laden air through the dust-collector.

WVe claim as our invention- I 1. In a dust-collector, the combination ofa bent or curved air-passage constructed with a perforated wall, whichdeects the dust-laden air out of its course, and a dead-air chamber,which receives the dust-particles, which are driven through the saidperforated wall by their momentum, while the air passes oif through saidpassage in another direction, substantially as described.

2. In a dust-collector, the combination, with a.` spiral passage havingan outer perforated wall, of a spiral dead-air chamber arranged on theouter side of said perforated wall, substantially as described.-

3. In a dust-collector, the combination,with a bent or curvedair-passage constructed with a perforated wall, which defiects thedust-laden air out of its course, of a dead-air chamber arranged on theouter side of said perforated wall, and partitions arranged in saiddead-air chamber, whereby its continuity is broken, substantially asdescribed.

4. In a dust-collector, the combination,with a bent or curvedair-passage constructed with a perforated outer wall, which deflects thedust-laden air out of its course, and with a perforated bottom, of adead-air chamber arranged on the outer side of said perforated wall andbelow said perforated bottom, substantially as described.

5. The combination, with the spiral airpassage B, having an outerperforated wall, b, inlet-spout A, and dischargespout D, of the spiraldead-air chamber E, open at the bottom, and a receiver, K, arrangedbelow the said chamber E, substantially as described.

6. The combination, with the spiral air- -passage B, having an outerperforated Wall, b,

inlet-spout A, and dischargefspout D, of the spiral dead-air chamber E,provided with partitions f, and receivinghopper K, substantially asdescribed.

Vitness our hands this 19th day of January, 1884.

BARNIM F. OR'IMAN. HORATI() R. TAYLOR.

Witnesses:

JN0. J. BONNER, F. L. BRowNE.

